<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主体 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区域 -->
                <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" 
                unique-opened  :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <template slot="title">
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" 
                        :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容主体 -->
            <el-main><router-view></router-view></el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        name:'Home',
        created() {
            this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        data() {
            return {
                //左侧菜单数据
                menulist:[],
                iconsObj:{
                    "125":'iconfont icon-users',
                    "103":'iconfont icon-tijikongjian',
                    "101":'iconfont icon-shangpin',
                    "102":'iconfont icon-danju',
                    "145":'iconfont icon-baobiao'
                },
                //是否折叠
                isCollapse:false,
                //被激活的链接地址
                activePath:''
            }
        },
        methods: {
            logout(){
                window.sessionStorage.clear()
                this.$router.push('/login')
            },
            //获取所有菜单
            async getMenuList(){
                const{data:res} = await this.$http.get('menus')
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
            },
            //点击切换菜单的折叠与展开
            toggleCollapse(){
                this.isCollapse = !this.isCollapse

            },
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath',activePath)
                this.activePath = activePath

            }
        },

    }
</script>

<style lang="less" scoped>


.home-container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #eaedf1;

}
.iconfont{
    margin-right:10px;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;

}



</style>
